EP1818567B1 - Courroie d'entrainement - Google Patents

Courroie d'entrainement Download PDF

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Publication number
EP1818567B1
EP1818567B1 EP20060002704 EP06002704A EP1818567B1 EP 1818567 B1 EP1818567 B1 EP 1818567B1 EP 20060002704 EP20060002704 EP 20060002704 EP 06002704 A EP06002704 A EP 06002704A EP 1818567 B1 EP1818567 B1 EP 1818567B1
Authority
EP
European Patent Office
Prior art keywords
drive belt
polyadduct
belt
belt according
resilient
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP20060002704
Other languages
German (de)
English (en)
Other versions
EP1818567A1 (fr
Inventor
Henning Dr. Kanzow
Claus-Lüder Mahnken
Reinhard Dr. Teves
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ContiTech Antriebssysteme GmbH
Original Assignee
ContiTech Antriebssysteme GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ContiTech Antriebssysteme GmbH filed Critical ContiTech Antriebssysteme GmbH
Priority to EP20060002704 priority Critical patent/EP1818567B1/fr
Priority to US11/704,308 priority patent/US7946940B2/en
Publication of EP1818567A1 publication Critical patent/EP1818567A1/fr
Application granted granted Critical
Publication of EP1818567B1 publication Critical patent/EP1818567B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G1/00—Driving-belts
    • F16G1/28—Driving-belts with a contact surface of special shape, e.g. toothed
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity

Definitions

  • the invention relates to a drive belt made of rubber with a surface reinforcement containing polyamide and / or polyester-containing textile reinforcement and on the outside has a surface coating of the friction-reducing material in a matrix of at least one elastic polyadduct.
  • the polyamide- and / or polyester-containing textile reinforcements can be both reinforcements based on aliphatic polyamides (eg nylon) or polyesters and also on the basis of aromatic polyamides (eg aramid) or polyesters act.
  • the surface reinforcement can be z. B. be nylon, polyester or blended fabric of both.
  • Polyadducts are polymers prepared by polyaddition, of which the most important are polyurethanes and polyureas.
  • Polyurethanes are prepared by addition of diisocyanates to polyols, while in the polyureas diisocyanates are linked via an addition reaction with polyamines.
  • Input drive belts and methods for their production are known from EP 1 088 177 A1 and the EP 0 662 571 A1 known.
  • toothed belts which have a tissue on the teeth, which is provided with a friction-reducing surface coating.
  • the surface coating is a polymer matrix (binder matrix of polyurethane, a polyadduct) in which polytetrafluoroethylene is embedded.
  • an abrasion-resistant composition proposed by Whitford Plastics Limited is disclosed in US Pat Name XYLAN® is available.
  • XYLAN® 1642-A-1429 mixture of short and medium-chain diols and polyester polyols with short and medium carbon chains (1-6 C atoms) between the polyol blocks with PTFE in organic solvent
  • XYLAN® 1642-B-1452 hexamethylene diisocyanate prepolymer with PTFE in organic solvent
  • a toothed belt formed from a solid polyurethane / urea elastomer composition, which composition has a high temperature resistance to 140 ° C and a low temperature resistance to -35 ° C in dynamic load applications.
  • the timing belt is provided with a surface reinforcement (tooth pad).
  • the invention is therefore based on the object to provide drive belts made of rubber, which is characterized by improved heat resistance, d. H. a longer service life when used under high temperatures, with good wear protection.
  • the observed effect could be due to the fact that it could lead to cleavage reactions in the polyadducts within the surface coating at particularly high temperatures, with short-chain fragments such.
  • propanediol or ethanediol arise. These have proved - probably due to their polarity - to be detrimental to the polyamide and / or polyester strength carrier of the surface reinforcement, so that the strength carrier z. T. swell, which leads to a loss of strength.
  • In the matrix of at least one elastic polyadduct may be, for. Example, a polyurethane, a polyurea or a mixed matrix of both act.
  • the polyadduct is formed from a diisocyanate, eg. B.
  • TDI 2,4- or 2,6-toluene diisocyanate
  • MDI 4,4'-methylene di (phenyl isocyanate)
  • HMDI 4,4'-methylenedicyclohexylisocyanate
  • HDI hexamethylene diisocyanate
  • 1,6-hexanediol or a polyester polyol for polyurethane or a polyamine for polyurea.
  • 1,6-hexanediol can be used as starting material of the polyadduct.
  • the elastic polyadduct may also be a polyurea. Short chain diols that the Damage carriers can not be released in the thermal decomposition of polyureas.
  • the elastic polyadduct is preferably a polyurea based on polyamines having the structure -NR 2 -C x R 1 y -NR 2 - with x ⁇ 4 and y ⁇ 0, where the R 1 and R 2 may be the same or different in a structural unit and are selected from hydrogen or carbon-containing groups.
  • the friction-reducing material may be different substances such.
  • graphite short fibers or fluoropolymers also act in a mixture.
  • fluoropolymers preferably with polytetrafluoroethylene, the best results have been achieved in terms of friction optimization and noise reduction.
  • the friction reducing material is preferably present in the matrix in amounts of from 40 to 60 percent by weight in order to provide good friction properties with good bendability of the belt and good adhesion of the friction reducing material to the belt.
  • the surface coating may contain other substances such.
  • dyes e.g., conductive carbon blacks, thickeners (eg., Cellulose acetobutyrate) or fillers.
  • the drive belt according to the invention may be, for. B. V-belt or V-ribbed belt with a surface reinforcement on the back or on the ribs of the belt act.
  • the belt is a toothed belt whose teeth have a surface reinforcement with a surface coating on the outside.
  • the timing belt offers the surface coating the friction reducing material in a matrix of at least one elastic polyadduct provides optimum protection of the fabric on the webs between the belt teeth in front of the teeth of the pulley. The tissue on the tooth webs of the belt is protected from rubbing and the surrounding belt teeth remain stable through the intact tissue.
  • the belt has good heat resistance. It is not premature to Zahnabscherept and the life of the belt when used at high temperatures can be significantly increased.
  • the surface reinforcement on the belt teeth of the toothed belt may contain polyamide and / or polyester strength members, which are usually used for better adhesion to the belt body made of rubber with an adhesive impregnation, for. B. an RFL dip provided.
  • polyamide 6.6 stretch fabric that works well with timing belt manufacture and provides good protection against low noise wear.
  • the surface coating penetrates the surface reinforcement to at most 3 ⁇ 4 of the layer thickness of the surface reinforcement, usually a fabric.
  • the tissue in the web region of the belt teeth of the toothed belt is provided with 50 to 600 g / m 2 , preferably 150 to 400 g / m 2 , of surface coating.
  • the weight of surface coating refers to the dry tissue and the dried surface coating.
  • the drive belt according to the invention can by methods known in the art, as for example in the EP 1 088 177 B1 described are produced.
  • the fabric for the surface reinforcement is usually before Applying an adhesive impregnation to the belt building drum, then wiping a paste of a vulcanizable rubber compound in an organic solvent onto the fabric side which comes in contact with the belt rubber, and finally the side of the fabric forming the outside of the belt a paste containing the friction-reducing material and the reactants of the matrix-forming elastic polyadduct in organic solvent, e.g. B. in 50% xylene, coated. After drying, the fabric is used in the usual way in the construction of the belt wrap. The wrapping blank is vulcanised and cut to the desired width.
  • the single figure shows schematically the cross section of a drive belt according to the invention.
  • a drive belt according to the invention in the form of a toothed belt is schematically shown, which has an elastomeric cover layer 1, a Switzerlandamidelage 2 of parallel reinforcing cords and belt teeth 3 of elastomeric material with interposed toothed webs 4.
  • the tooth side of the belt, d. H. the belt teeth 3 and belt webs 4 are provided with a surface reinforcement 5 in the form of a fabric.
  • the tissue of the surface reinforcement 5 has a surface coating 6.
  • HNBR-based rubber timing belts with a tensile layer of glass cords and a nylon 6.6 stretch-toothed fabric were produced.
  • the tooth tissue was in all cases equipped with a CSM-based RFL dip, then the tissue was dipped with an adhesive called overcoat and coated on the rubber side with a paste of HNBR rubber compound in organic solvent.
  • the treatment of the fabric side forming the outside of the tooth was made differently in the three belts. After drying all on the tissue applied layers, the fabric was used in the usual way in the belt construction.
  • comparative belt A the fabric on the tooth side was provided with no further coating.
  • XYLAN® product of XYLAN® 1642-A-1429 and XYLAN® 1642-B-1452 from Whitford.
  • the XYLAN® consists not only of PTFE powder (about 25% by weight) and a solvent mixture (about 50% by weight) of the polyurethane-forming components diisocyanate and a mixture of short- and medium-chain diols, essentially 1,2- Propanediol, ethanediol and 1,6-hexanediol, and polyester polyols with short and middle -OC x R y -O-blocks.
  • the fabric on the tooth side was treated with a XYLAN-analogous mixture which was the same in components and concentrations except for the diol and polyol components.
  • the mixture of short- and medium-chain diols and polyester polyols with short and middle -OC x R y -O- building blocks was replaced by pure 1,6-hexanediol and polyester polyol with the -OC 6 H 12 -O- building block.
  • the three belts were tested for service life at very high service temperature (170 ° C) and web cloth wear at room temperature.
  • very high temperature service life the belts were tested on an electrically towed component test stand at 170 ° C ambient temperature and 4000 rpm.
  • the belts were tested on the same test stand at room temperature at a rotational frequency where the highest tensile forces occur. By varying the rotational frequency so the forces acting on the belt forces are dramatically increased and the webs of the belt are thereby heavily stressed. Table 1 shows the results of the investigations.
  • the fabric C has the desired high elongation at break for belts even after exposure to high temperatures, while the tissue B in the presence of the XYLAN coating at high temperatures significantly embrittle and does not show sufficient strength to stabilize the belt teeth.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Woven Fabrics (AREA)

Claims (13)

  1. Courroie d'entraînement en caoutchouc, dotée d'une armature de surface (5) qui contient des renforts textiles contenant du polyamide et/ou du polyester, et qui présente sur son côté extérieur un revêtement de surface (6) en un matériau réduisant le frottement, incorporé dans une matrice constituée d'au moins un produit élastique de polyaddition,
    caractérisée en ce que
    le produit élastique de polyaddition présente par rapport au polymère moins de 2 % en poids de motifs de structure -O-CxRy-O- avec x = 1-3 et y = 0-6, les R d'un motif structurel pouvant être identiques ou différents et étant sélectionnés parmi l'hydrogène et les groupes carbonés.
  2. Courroie d'entraînement selon la revendication 1, caractérisée en ce que le produit élastique de polyaddition présente par rapport au polymère moins de 0,5 % en poids de motifs de structure -O-CxRy-O- avec x = 1-3.
  3. Courroie d'entraînement selon les revendications 1 ou 2, caractérisée en ce que le produit élastique de polyaddition est un polyuréthane à base de polyols de structure -O-CxRy-O- avec 4 ≤ x ≤ 20 et y = 0-40, les R d'un motif structurel pouvant être identiques ou différents et étant sélectionnés parmi l'hydrogène et les groupes carbonés.
  4. Courroie d'entraînement selon la revendication 3, caractérisée en ce que le produit élastique de polyaddition est un polyuréthane à base de polyols de structure -O-CxRy-O- avec x = 6.
  5. Courroie d'entraînement selon les revendications 1 ou 2, caractérisée en ce que le produit élastique de polyaddition est une polyurée.
  6. Courroie d'entraînement selon la revendication 5, caractérisée en ce que le produit élastique de polyaddition est une polyurée à base de polyamines de structure -NR2-CxR1 y-NR2- avec x ≥ 4 et y ≥ 0, R1 et R2 d'un motif structurel pouvant être identiques ou différents et étant sélectionnés parmi l'hydrogène et les groupes carbonés.
  7. Courroie d'entraînement selon les revendications 1 ou 2, caractérisée en ce que la matrice en au moins un produit élastique de polyaddition contient du polyuréthane et de la polyurée.
  8. Courroie d'entraînement selon l'une des revendications précédentes, caractérisée en ce que le matériau réduisant le frottement est une poudre de polymère fluoré.
  9. Courroie d'entraînement selon la revendication 8, caractérisée en ce que le polymère fluoré est le polytétrafluoroéthylène.
  10. Courroie d'entraînement selon l'une des revendications précédentes, caractérisée en ce que le matériau réduisant le frottement est présent dans la matrice à raison de 40 à 60 % en poids.
  11. Courroie d'entraînement selon l'une des revendications précédentes, caractérisée en ce que la courroie est une courroie crantée en caoutchouc.
  12. Courroie d'entraînement selon la revendication 11, caractérisée en ce que l'armature de surface (5) est un tissu étirable en polyamide 6.6 appliqué sur les crans de la courroie.
  13. Courroie d'entraînement selon la revendication 12, caractérisée en ce que dans la partie nervurée des crans de la courroie, le tissu est doté de 50 à 600g/m2 et de préférence de 150 à 400 g/m2 de revêtement de surface (6).
EP20060002704 2006-02-10 2006-02-10 Courroie d'entrainement Not-in-force EP1818567B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20060002704 EP1818567B1 (fr) 2006-02-10 2006-02-10 Courroie d'entrainement
US11/704,308 US7946940B2 (en) 2006-02-10 2007-02-09 Drive belt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20060002704 EP1818567B1 (fr) 2006-02-10 2006-02-10 Courroie d'entrainement

Publications (2)

Publication Number Publication Date
EP1818567A1 EP1818567A1 (fr) 2007-08-15
EP1818567B1 true EP1818567B1 (fr) 2014-01-08

Family

ID=36597803

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060002704 Not-in-force EP1818567B1 (fr) 2006-02-10 2006-02-10 Courroie d'entrainement

Country Status (2)

Country Link
US (1) US7946940B2 (fr)
EP (1) EP1818567B1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20070643A1 (it) * 2007-09-12 2009-03-13 Dayco Europe Srl Cinghia di trasmissione comprendente un trattamento di copertura del tessuto e trattamento di copertura relativo
DE102008013570A1 (de) * 2008-03-11 2009-09-17 Contitech Antriebssysteme Gmbh Riemen, insbesondere Kraftübertragungsriemen, mit einer Beschichtung mit einem aliphatischen Polyisocyanurat-Polyharnstoff als Bindemittel und Verfahren zu seiner Herstellung
DE102008055497B4 (de) 2008-12-10 2020-06-18 Contitech Antriebssysteme Gmbh Elastischer Artikel, insbesondere Antriebsriemen, mit einer Textilauflage und einem Haftvermittler aus schmelzbarem Kunststoff
DE102010017781A1 (de) 2009-09-11 2011-03-17 Contitech Antriebssysteme Gmbh Kraftübertragungsriemen, insbesondere Zahnriemen, und Verfahren zu dessen Herstellung
DE102010017786A1 (de) * 2010-07-07 2012-01-12 Continental Reifen Deutschland Gmbh Elastomerprodukt, enthaltend ein linienförmiges, textiles Gebilde zur Verstärkung
DE102011002274A1 (de) 2011-04-27 2012-10-31 Contitech Antriebssysteme Gmbh Elastischer Artikel, insbesondere Antriebsriemen, mit einer Beschichtung in Form eines Vlieses aus einem schmelzbaren Kunststoff
DE102011050483A1 (de) 2011-05-19 2012-11-22 Contitech Antriebssysteme Gmbh Antriebsriemen mit einem Verstärkungsband oder einem Verstärkungsgeflecht oder mit zonenweise angeordneten Verstärkungselementen innerhalb des Unterbaus
DE102011056071A1 (de) 2011-12-06 2013-06-06 Contitech Antriebssysteme Gmbh Verfahren zur Oberflächenbeschichtung eines Artikels, insbesondere eines Keilrippenriemens, sowie Vorrichtung hierzu
BR112016025671B1 (pt) * 2014-05-02 2021-09-21 Dayco Europe S.R.L. Correia de transmissão e sistema de transmissão
DE102019212077A1 (de) 2019-08-13 2021-02-18 Contitech Antriebssysteme Gmbh Zahnriemen zur Verwendung in Ölumgebung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4486375A (en) * 1983-02-23 1984-12-04 Mitsuboshi Belting Ltd. Method of manufacturing toothed belts
DE4400434A1 (de) 1994-01-10 1995-07-13 Continental Ag Kraftübertragungsriemen aus elastomerem Werkstoff mit günstige Gleiteigenschaften aufweisenden Riemenoberflächen
ATE206444T1 (de) * 1994-07-14 2001-10-15 Gates Corp Hochtemperaturbeständige polyurethan/harnstoff- elastomere
US6175712B1 (en) * 1998-07-27 2001-01-16 Bridgestone Corporation Intermediate transfer member and image formation apparatus using same
GB2349113B (en) 1999-04-21 2003-07-02 Gates Corp Wear resistant belts and a process for their manufacture
DE10108165C1 (de) * 2001-02-20 2003-01-30 Contitech Antriebssysteme Gmbh Zusammensetzung für eine antistatische Schicht auf der Oberfläche von Produkten aus Gummi
DE10144547A1 (de) * 2001-09-10 2003-03-27 Arntz Beteiligungs Gmbh & Co Zahnriemen

Also Published As

Publication number Publication date
US20070191163A1 (en) 2007-08-16
US7946940B2 (en) 2011-05-24
EP1818567A1 (fr) 2007-08-15

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